Add more list :
4. CSGOAtse.
5. WTFSkin.
If you are really interested with CSGO Gambling Topic, maybe you can subscribe to a youtube who really gambling especially to a youtube who really play CSGO too. One of the examples
juicy :
https://www.youtube.com/channel/UC_i5slkwxbZKPeh9x2QWkSwAlmost, YouTuber like
juicy always playing on a gambling site with the topic of CSGO.
Note: I don't use any these, so please be the responsibility to use the website and checked first.